Reamer



W. C. RUHLANDT.

BEAMER.

APPLICATION FILED AUG. l2. |920.

1,415,121. y vIawmm May 9, 1922.

' mamey PATENT ortica.

WALTHER C. RUHLANDT, 01E' JACKSON, MICHIGAN.

REAMER. y

Specification of Letters Patent.

- Patented May 9, 1922.

Application filed August 12, 1920. Serial No. 402,984.

`To all ,whom t ma@ concern:

Be it known that l, VALTHER C. ldUHV LANDT, a citizen of the United States, residing at Jackson, in the county of Jackson and State of Michigan, have invented certain new and useful Improvements in Reamers, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to an improved reamer and an object is to provide a very simple, efficient and practical tool of this kind wherein the blades are capable of adjustment in order to increase or decrease the travel of the tool and furthermore to provide a tool capable of being cheaply made and ysold at a reasonable profit.

Another object is to provide a reamer wherein the blades are adjustably mounted in a shell, in combination with an arbor on which lthe shell is mounted, and means in conjunction with the shell and rigidly operative with the .arbor so as to adjust the l shell for changing the position of the blades, in other Lwords for extending or retracting them in order to vary the diameter of the travel of the edges of the blades.

Still another object is to provide a reamer or milling tool wherein-the blades are ex? tens'ible kor retractible and capable of adjustments at points intermediate the minimum or maximum diameters of the travel of the cutting edges/of the blades. n

A further robject is to kprovide a tool of this kind including means for locking the blades .sothat'the tool can be used as a rigid reamer or cutter.

While the design and construction -at present illustrated and set forth is deemed preferable, it is obvious that asa result ofv a reduction of the inventionto a more practical form for commercial purposes, the in# vention may be susceptible to changes, and the right tothese changes is claimed, provided they are comprehended within the scope of what is claimed. Y

The invention comprises further features and combination of parts, as will be hereinafter set forth, shown in the drawings and claimed. v

In the drawings Figure 1 is a view in elevation of the reamer or cutter constructed in accordance with the invention,

Figure 2 is a sectional view on line 2 2 of Figure 1,

Figure 3 is a cross sectional view on line 8 3 of Figure 1,

Figure 4 is a cross sectional view on line 4 4 of Figure 1 showing the bladesretracted, y

Figure 5 is a cross sectional view on line 5 5 of Figure 1,

Figure'6 is a view in side elevation of a modified form of reamer or milling tool,

Figure 7 is a cross sectional view on line 7 7 of Figure 6.

Referring to the drawings, 1 designates an arbor which is of the usualconstruction and adapted to engage with the chuck of a milling machine (not shown). Formed as an integral part of the arbor is a collar 2 and engaging the arbor and in contact means of a feather 4 on the arbor so as to Y prevent rotation. This collar 3 is provided with a segmental cut away portion 5.

Movably mounted upon the arbor beyond thefcollar 3 is a tool holding shell 6 which is provided with radial openings or slots 7 which are engaged -by the blades 8. One end of the shell adjacent the collar 3 has an extension 9 which engages the'segmental out away portion of the face of the collar 3. The opposite radial walls of the segmental cut away portions 5 of the collarB are providedv with threaded bores or recesses 10'in which the screws 11 are threaded. These screwslhave rounded heads 12which are designed to bear against the opposite radial walls of the extension 9 and by using a span'- ner (not shown) to engage the depressions 13 of the heads of the screws 11, thescrews may be adjusted, one in one direction and the other in the opposite direction.

In other words, by moving one of the screws outwardly and moving the other screw inwardly, the position of the extension 9 of the shell may be altered thereby adjusting the shell relatively to the arbor that'is to say, the portion 14 thereof axially beyond the portion 15 wliichengages the chuck of the milling machine (not shown).

While the openings or slots 7 are arrangedV radially it is to be noted that they are provided with opposite walls offset differently site wall 18 is offset from the center of the gated grooves 19 which are substantially cylindrical in forni, and are engaged by the substantially cylindrical retaining beads or ribs or enlargements 2O oi the blades. lt will be note-'d that these grooves '19 are so constructedY as to permit ot' a ,rocking movement 'of the blades, that is to say, when the shell is adjusted relatively to the portion 14 'of the arbor in orderl to retract or extend the blades which have cutting edges 21.v

The adjustment of the shell is accomplished by adjusting the screws l1. Mounted: on the,V portion ill: o'lf the arbor adjacent one end of the shell is'a washer 22 and engaging the threaded end 'of the portion 111 of the arbor is a nut 2a; which holds the washer 22 Yagainst the end oi' the' shell.

As shown in Fi'ur'e'2 of the drawings i. h b 7 vthe end 'oit the shell engaged by` the washer 22 is provided with openings 25 which are alignedwitli the grooves 19 oli the portion 1476i thearbor. .Engaging these openings arev pins 26 which also engagethe recessesv 27 Vtermed in the wall of the centrall opening of the washer 22. lt will he noted that by adjusting the nut l2li inthe direction of` the washer 22, the pins 26 may be forced toward and in engagement with the ends of the substantially cylindrical enlargements 20 of ,the blades, thereby acting to take up the end thrust ofthe blades, when the parts are adjusted. lt will be noted that the slots 7 lparticularly their outer portions are a little wider than the thickness of the blades so as to permit a rocking movement of the blades when the shell is adjustedv relatively to the arbor. rlhe shell is provided with threaded recesses or bores 28 which are positioned in parallelism with the Walls 16 of the openings or slots 7 and adapted to engage these recesses oi"- bores are headed screws 9. Ordinarily when using the reamei' or milling tool sothat'the parts are capable ot adjustments the screws 29 are dispensed with, although theyV may be used it desired, even tlioi'i'gh it will be noted that the tool is used an adjustable 'reamer. .Y llowever, in order to make a rigid reainer or. 'milling'l tool, the screws 29 may be inserted so that their heads will be engaged byjlcertain of the faces of the blades thereby providing an abutment and at the same time acting to lock the blades in position. Also these screws serve as means to lessen the bearing Asurfaces for certain faces of the from the shell.

blades instead of permitting certain faces of theblades to lie dat against the walls 16 et the openings 7.

rlhe shell is also provided with cavities 8O for the reception or expansion coil springs 3l which'act to prevent vibration o r jarring of the blade when the tool is in action.

Referring-to Figures 6 and 7 it will be noted that a modilied i'orm of reamer or milling tool is provided and in this 'case the screws 29 and the springs r31' are dispensed with and in lieu thereof tapered elongated pins 32 are employed. Thesepins 32 engage correspondingly,shaped grooves or` openings formed, in the walls 16 of the slots 7 so that'by adjusting the nut24and causing it to jam against thew'asher 22, ther` blades may be locked in position.

It will be noted that in Figures l and 3 the screws 29'have flat faces as indicated at 29a the bladesto yieldably in'ovein other words, permit the blades to expand and contract. Furthermore the screws are adjustedv so as to position the flat faces opposite the blades which when opposite the blades permit while adjusting the reaniei' 4and after theV reainer is adjusted the .screws are turned so aste cause their cylindrical portions to engage the blades and lock them in position.V These screws remain 'at all times in the shell' et the reamer and when the cylindrical portions are in engagement with the blades act to preventV oirelieyevibration of the blades' Ablades provided and furthermore lock the the us'er prefers it.

Furthermore owing to 'they slots being wider than the thickness voit the blades therel by affording clearance, the flat faceswhen opposite the blades will permit the blades* to rock. j

1n Figures 6 and 7 'aie locking pins 32 sie" tapered and are setinthe 'washer 22 and'A furthermore the holes in the shell are alsol tapered; By, adjusting thenut. 24 tightV against the washer 22 will torce the pinsy 32 against` all of the blades at the Sametime which makes a rapid adjustment Whenthe device "is being used a' rigid reainen When the nut 2471sV loosened and then *renr moved, the washer nia-y be removed, and ater whichY the shell 6' of the reanier may be detached 'roin'the portion or`spindle'14 aiter which the blades may be reni'oved The invention'havin'g been set iforth, what is claimed" as new andv useful is l, ln Ya reame'r, an arbor, a plurality oiC radial blades ioclably vcarried bythe 'arbor iio and extending radially therefrom, a shell roy Y tatably adjustable on the arbor and through which the bladesengage, and means carried bythe arbor 'and'opei'atively ,connecting with the shell for adjusting the saine to retract or extend the blades.

2. ln a reamer, an arbor, a shell rotatably ladjustable thereon, said arbor including a lplurality of blades rockably connected thereto and arranged in radial formation and loosely engaging through the shell, and,

means for adjusting the shell partially rotatably relatively to the arbor for retracting` or extending the blades, and means for preventing vibration of the blades.

Ll. In a reamer, an arbor, a shell rotatably adjustable thereon, said arbor including a plurality of blades rockably connected thereto and Varranged in radial formation and loosely engaging through the shell, means for adjusting the shell partially rotatably relatively to the arbor for retracting or extending the blades, means or preventing vibration of the blades, and means for locking the blades and converting the tool into a rigid reamer. I

5. In a reamer, an arbor, a shell rotatably adjustable thereon, saidv arbor including a plurality of blades rockably connected thereto and arranged in radial formation and loosely engaging through the shell, means for adjusting the shell partially rotatably relatively to the arbor for retracting or extending the blades, and means for looking the blades thereby converting the tool into a rigid reamer.

6. In a reamer, an arbor, a shell through which the arbor rotatably extends, said shell having a plurality of slots, the inner portions of the Walls of the slots being divergent in a direction toward the axial center of the reainer, blades movably connected to the arbor and engaging through the slots, Whereby upon movement of the shell relatively to the arbor, the blades may be retractedl or extended With relation to the periphery of the shell.

7. In a reamer, an arbor, a shell through which the arbor rotatably extends, said shell having a plurality of slots, the inner portions ot the Walls of theslots being divergent in a direoton toward the axial center of the reamer, blades movably connected to the arbor and engaging through the slots, Whereby upon movement of the shell relatively to the arbor, the blades may be retracted or extended With relation to the periphery of the shell, and means for adjusting the shell, for varying the extensibility of the blades.

In testimony whereof I hereunto aliix my signature;

WALTHER C. RUHLANDT. 

